Easier to buy more serial ports. Its possible to add one or two rather easily and inexpensively. If you need more, there are 8 and 16 port expansion cards you can buy. Tom Turak -----Original Message----- : I have bought a computer that a USB port and a serial : port. I want to use this computer for multiple interface : like radiation and IV measurements. Is it possible to : connect a data logger or other RS 323 devices to the : USB port? : : Chilangisha Do you want to signoff PCBUILD or just change to Digest mode - visit our web site: http://freepctech.com/pcbuild.shtml